Starting to parse Lora config

ampel-firmware/lorawan.cpp

@@ -65,11 +65,43 @@ namespace lorawan {
   bool connected = false;
   char last_transmission[23] = "";
 
+  uint8_t hexToByte(char c) {
+    int v = -1;
+    if ((c >= '0') && (c <= '9')) {
+      v = (c - '0');
+    } else if ((c >= 'A') && (c <= 'F')) {
+      v = (c - 'A' + 10);
+    } else if ((c >= 'a') && (c <= 'f')) {
+      v = (c - 'a' + 10);
+    }
+    return v;
+  }
+
+  void parseConfig(const char *hex) {
+    int n = strlen(hex);
+
+    Serial.println(hex);
+    Serial.print("Size : ");
+    Serial.println(n);
+
+    for (int i = 0; i < n; i = i + 2) {
+      uint8_t r = hexToByte(hex[i]) << 4 | hexToByte(hex[i + 1]);
+      Serial.print(r, HEX);
+      Serial.print(" ");
+    }
+    Serial.println();
+    Serial.println("-----");
+  }
+
   void initialize() {
     Serial.print(F("Starting LoRaWAN. Frequency plan : "));
     Serial.print(config::lorawan_frequency_plan);
     Serial.println(F(" MHz."));
 
+    parseConfig(config::lorawan_device_eui);
+    parseConfig(config::lorawan_app_eui);
+    parseConfig(config::lorawan_app_key);
+
     // More info about pin mapping : https://github.com/mcci-catena/arduino-lmic#pin-mapping
     // Has been tested successfully with ESP32 TTGO LoRa32 V1, and might work with other ESP32+LoRa boards.
     const lmic_pinmap *pPinMap = Arduino_LMIC::GetPinmap_ThisBoard();